James beady



'(No Model) J. BRADY. V MACHINE FOR WINDINGELEGTRIGAL ARMATURE'S.

N0. 243,844. Patented Ju1y 5, 1881.

' M PETERS. Pnmoumu n ner, Willling'om ac,

UNITED STATES PATENT OFFICE.

JAMES BRADY, OF BROOKLYN, NEW YORK.

MACHINE FOR WINDING ELECTRICAL ARMATURES.

SPECIFICATION forming part of Letters Patent No. 243,844, dated July 5,1881.

Application filed October 28, 1880. (No model.)

To all whom it may concern:

Be it known that I, JAMES BRADY, of Brook lyn, Kings county, New York,have invented an Improved Machine for Winding Electrical Armatures, ofwhich the following is a specification.

This machine is designed specially for the winding of what is known asthe Gramme ring-armatures, consisting of a ring or coil of wire formingthe core of the armature, on which the induction-coils, of copper wire,are wound in closely-adjoinin g sections or segments, each one of whichis distinct from the other and connected at each end with thecommutator.

Heretofore the winding of the coils onto the core has been done by hand,which is a slow and laborious method, whereas I aim to effect the samein a more rapid and perfect manner by the present machine, which is ofthe same class as that shown in my former application, filed August 14,1880, but dift'eringin its special construction, which hence constitutesthe subject of my present application, as hereinafter set forth.

In the annexed drawings, Figure lgives a plan view of my improvedmachine, part thereof being shown in section, as is also the armature,which is represented in the act of being Wound with its firstinduction-coil. Fig. 2 is a side elevation, showing the winding machinein cross-section. Figs. 3 and 4 show details hereinafter described.

The core of the armature to be wound is indicated at a, and consists, asusual, of a coil of iron wire of oblong section, with rounded ends, asseen best in Fig. 1. Before winding this core with the copper coils thecore is covered with a number of segmental blocks, 12 I), made in halvesand clamped on the core, as fully illustrated in Figs. 1 and 2. Theseblocks correspond in number with the coils to be wound on the core, andwhen one of them is removed, as shown in Fig. 2, it exposes a segmentalsection of the core to admit of the winding thereon ofone of the coilsof copper wire, so as to properly fill the segmental space. The armaturewhile being thus wound is clamped on acurved bed or rest, 0, in theusual manner, (illustrated,) and as each coil is wound thereon thearmature is loosened, turned round on its bed the space of one section,again clamped, the next block removed, and the next coil wound thereon,and so on successively till all the sections are wound. The wire to formeach coil is first wound from each end equally on two bobbins or reels,and the middle part of this wire, between the bobbins, (see Figs. 1 and2,) is placed against the middle of the exposed section of thearmature-core, and the bobbins are then revolved around the same inopposite directions, so as to wrap the wire compactly thereon from eachbobbin simultaneously, and onto and from the center of the sectionoutward, and Vice versa, the winding being all, of course, on the samepitch, and the opposite ends being finally met and twisted together toconnect with the commutator. This is the usual process of winding thearmature as just described, the bobbins being revolved about the exposedsection by hand, and it is this latter operation which my machine isdesigned to accomplish with more accuracy and rapidity.

In my former machine the bobbins were revolved by rigid circular ringsrevolving in opposite directions and passing through the armature-rin g,the exposed section of which projected within the rotary rings, so as towrap the wire around the same in the manner already described. In mypresent machine I employ flexible or jointed endless bands or chains ofoval continuity corresponding to the cross-section of the armaturecore,whereby the bobbins are revolved about the same in a path concentricwith and parallel to the core of the armature, thus avoiding slack oreccentric points in the winding, which almost necessarily exists in theother case.

In the drawings, A A indicate the flexible endless bands or chains,which are mounted to freely run in grooves or ways on each side of thefixed frame B, the armature being so arranged that its exposed sectionto be wound is in the center or axis of the system, while the frame Bpasses through and the bands A A, with their attached bobbins,revolvethrough the armature-rin g and around the exposed section thereof, themotion of the bands being hence parallel to and concentric with thecrosssection of the armature; hence no slack or eccentric points existin the winding, and the as fully shown in tension or unwinding pull ofthe wire upon the bobbins is regular throughout the revolution. In thespecial case illustrated I prefer to form the endless bands as chainscomposed of broad, flat, or thin metal links, all joined together neartheir inner edge, as shown. The joint is a kind of rule-joint, the linksbeing halved together at the joint and inclosing a beveled-edge roller,0, free to turn on the connecting-stud f of the joint, as shown. Theedges of these rollers project into a V-groove on the rim of theguiding-frame B, while an upright roller, g, near the outer end of eachlink, rolls on a ledge near the outer rim of the frame, so that eachlink of the chain is thus properly supported and guided by theseanti-friction rollers, and the motion of the chain rendered smooth andeasy, and at the same time the chain is prevented from rising out ofplace. The under or inner face of each link (see Fig. 4) is formed withrack-teeth, as seen best in Fig. 4., which teeth are engaged at onepoint of the chain by a pinion, h,revolving in a suitable bearing andcavity in the frame B and driven by suitable power, so that both chainsbecome thereby rotated simultaneously and at equal speed in oppositedirections. Now, each chain, of course, carries one of the bobbinshaving one length of wire wound equally thereon, as already described,and illustrated in Figs. 1 and 2, these bobbins being attached to eachchain at diametricallyopposite positions and of a size and shape toreadily pass through the armature-ring, as shown. The links on which thebobbins are mounted are each formed with a conical boss, in, which fitsinto a conical hub on the bobbins, and the bobbin is held in placethereon by a central screw, it, screwing into the boss, and by a broadwasher, 0, between the head of the screw and the hub of the bobbin,which washer is prevented from turning by a pin, 19, passing through itinto the boss, Figs. 1 and 2. The bobbin is thus not only accuratelymounted on and connected with the chain, but by tightening the screw itthe friction between the hub and the boss may be nicely regulated to putany desired tension on the unwinding wire, so as to efiect the windingthereof onto the armature with any desired degree of tautness, as willbe readily understood.

I prefer to mount the frame B of the machine on a broad table-top bymeans of the posts 0, removably fixed on the table-top, the rest a forthe armature being also fixed on the table, as seen best in Fig. 2. Theframe and chain of the machine are, of course, so made that they may bedivided and opened to admit the internal placement of that side of thearmature being wound, as shown. The chain may, of course, be divided atany link by removingone of the joint-screws f, and the frame B ispreferably divided on the center line, 00 00, as shown, the semicircularsectionbeing removable from the larger section, which latter ispreferably fixed permanently to the tabletop. Hence, by detaching andremoving the semicircular section and separating the chain at the lineof division the machine may be easily opened to admit of the properplacement of the armature, as shown in Figs. 1 and 2, and may be againfastened together in a simple manner. Now, for winding armatures ofgreater or less width than that shown the machine maybe readily extendedor contracted to correspond therewith. This may be done by providing anumber of the removable sections for the frame of variable lengths, andthe chain may, of course, be extended or contracted to correspond byremoving or inserting links, so that the revolving chain will always beconcentric with the cross-section of the armature, or practically so.

I prefer the special form of chain illustrated; but of course any othersuitable form of chain may be employed, and even flexible bands ofleather or rubber with the bobbins attached thereto in substantially thesame manner may be employed without departing fIOIIl-tllfi prim ciple ofmy machine.

The action of the machine in effecting the accurate and rapid winding ofeach section of the armature may now be readily understood from what hasbeen before stated and a con sideration of the drawings withoutrequiring any further description.

I do not claim in this application the broad idea of using ringsrotating through a ring armature in opposite directions for the purposedescribed, as this invention forms the subject ofa separate and previousapplication.

What I claim is- 1. A machine for winding electrical armatures of thekind described, constructed with a flexible or jointed endless band orchain, dis posed parallel or concentric with the cross-section of thearmature, and arranged to revolve about the same, carrying a bobbincontaining the wire to be wound thereon, substantially as herein setforth.

2. A machine for winding electrical armatures, consisting of twoflexible or jointed endless bands or chains revolved in opposite directions through the armature-ring and about the exposed section thereofin a path concentric with the crosssection of the armature core, ornearly so,and each carrying a bobbin containing the same length of wire,which becomes wrapped upon the armature-core, substantially as hereinshown and described.

3. In a machine of the described kind, a chain of jointed links, one endof each link overlapping one end of the next adjoining link at thejoint, and forming a recess inclosing a roller, substantially as and forthe purpose specified.

4. In a machine of the kind described, two traveling chains moving inopposite directions, one above the other, and having their links formedwithteeth for engaging with opposite sides of the same driving-pinion,substantially non-rotatin g washer o, substantially as and for as andfor the purpose described. d the purpose set forth.

5. The combination, in a machine of the escribed kind, of a travelingendless band carry- JAMES BRADY 5 ing a bobbin free to turn thereon, afriction Witnesses:

seat or axis between said bobbin and chain, to- CHAS. M. HIGGINS, getherwith the central adjusting-screw, n, and EDWARD H. WALES.

